1 Features
• AEC-Q100 qualified for automotive applications
– Temperature Grade 1: –40°C to 125°C
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4
• Functional Safety-Capable
– Documentation to aid functional safety system
design
• Relative humidity (RH) sensor:
– Operating range: 0% to 100%
– Accuracy: ±0.5% typical
– Offset Error Correction: reduces offset to return
device to within accuracy specification
– Long-term drift: 0.19%RH/yr
– Condensation protection with integrated heater
• Temperature sensor:
– Operating range: –40°C to 125°C
– Accuracy: ±0.1°C typical
• NIST traceability: relative humidity & temperature
• Low power: average current 0.4 μA
• I2C interface compatibility up to 1-MHz speeds
– Four selectable I2C addresses
– Data protection through CRC checksum
• Supply voltage: 1.62 V to 5.50 V
• Available auto measurement mode
• Programmable interrupts
• Programmable RH and Temp measurement offset
• Factory-installed polyimide tape assembly cover
• Factory-installed IP67 rated environmental cover
• WSON package with wettable flanks options

2 Applications
• Automotive HVAC control module
• Automotive HVAC sensor - air quality
• Automotive Particulate Matter PM2.5
• Battery Management Systems
• On Board Charging
• Automotive Camera

3 Description
The HDC302x-Q1 is an integrated capacitive based
relative humidity (RH) and temperature sensor. The
device provides high accuracy measurements over
a wide supply range (1.62 V – 5.5 V), along
with ultra-low power consumption in a compact 2.5-
mm × 2.5-mm package. Both the temperature and
humidity sensors are 100% tested and trimmed on a
production setup that is NIST traceable and verified
with equipment that is calibrated to ISO/IEC 17025
standards.
Offset Error Correction reduces RH sensor offset due
to aging, exposure to extreme operating conditions,
and contaminants to return device to within accuracy
specifications. For battery IoT applications, auto
measurement mode and ALERT feature enable low
system power by maximizing MCU sleep time. There
are four different I2C addresses that support speeds
up to 1 MHz. A heating element is available to
dissipate condensation and moisture.
The HDC3020-Q1 is an open cavity package without
protective cover. Two device variants have a cover
option to protect the open cavity RH sensor:
HDC3021-Q1 and HDC3022-Q1. HDC3021-Q1 has
removable protective tape to allow conformal coatings
and PCB wash. HDC3022-Q1 has a permanent IP67
filter membrane to protect against dust, water and
PCB wash. All three package variants have wettable
flanks option.